Overmolding Services

High-quality custom overmolding services for prototypes and on-demand production parts. Get online quotes, short cycle time and competitive pricing.

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30t-1800t

Molding Machine

12

Surface Finishes

0pc

MOQ 

0.025mm

Tolerances

Custom Overmolding Services

The overmolding process involves molding one plastic material over another. This ensures a seamless combination of multiple plastic parts to give a uniform and durable product. Insert molding and multi-shot molding processes help combine materials for functional and aesthetic purposes. RapidDirect’s plastic injection overmolding uses these processes to ensure every component meets industrial standards.

overmolding products

Quote Within One Day, Operate at Your Fingertips

RapidDirect provides a AI-powered, hassle-free online quotation platform that can help simplify your ordering and manufacturing process. Stop wasting time in emails, get interactive quotes with DFM analysis within seconds, optimize your orders immediately, compare your multiple quotes side by side, manage your orders in one place.

 
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Bulk Pricing ​

Get in-bulk quotes, allowing you to make a pricing comparison between different specs, quantities, raw materials, and surface finishes, and helping you choose the solution that best suits your needs and budget.

Real-time Order Tracking ​

Our online platform enables real-time visibility of the production flow that fosters more efficient operation monitoring and quicker response to negative changes.

All-in-one Order Management​

Quickly check, search, and manage all your orders in one place. What's even better is that you get visibility into all stages of the production process and every aspect of the manufacturing operation.

RapidDirect Overmolding Capabilities

RapidDirect’s custom overmolding services ensure the creation of plastic parts that look and perform better. Our production line consists of an overmolding injection molding process that allows us to combine several different materials into one, ensuring you get superior-quality products.

 
Standards Metric Units Imperial Units
Maximum Part Size 200×400×100mm 7.87×15.75×3.94in.
Minimum Part Size 2×2×2mm 0.08×0.08×0.08in.
Substrate Wall Thickness From 0.5 to 3mm From 0.20 to 0.12 in.
Tolerance +/- 0.025 mm +/- 0.00098 in.
Radii 0.1mm 0.0039in.
Depth 100mm from the parting line 3.94in. from the parting line
Mold Validation Provide T0, T1, T2 samples before mass production
Inspection and Certification Options First Article Inspection, ISO 9001, ISO 13485
Lead Time From mold making to sample delivery: 15-45 business days

Materials for Overmolding

RapidDirect’s overmolding service incorporates choosing the right materials, ranging from thermoplastics to exotic resins. There are multiple possible combinations of overmolding materials and substrates. Here are some of the most common materials we use for the plastic overmolding process.

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  • Tooling Materials
  • Plastic Materials
  • Additives & fibers
Injection Molding Tool Steel Mold

Tooling Materials

Before the overmolding process starts low or high-volume production, a high-tolerance CNC machined tooling is needed. Most commonly used materials include:

Tool Steel: P20, H13, S7, NAK80, S136, S136H, 718, 718H,  738

Stainless Steel:

420, NAK80, S136, 316L, 316, 301, 303, 304

Aluminum: 6061, 5052, 7075

Plastic Materials

Plastic Materials

Plastic injection molding service comes with a wide range of materials with different properties, including impact strength, rigidity, thermal resistance, chemical resistance, etc.

Injection molding plastic adhensive and fiber

Additives and Fibers

Standard plastic materials may not meet custom injection molding parts requirement. In this case, additives and fibers can be added to improve aesthetic and functional properties, providing additional features for your injection molded parts.

UV absorbers Colorants
Flame retardants Glass fibers
Plasticizers

Surface Finishes of Overmolding

Improve the quality of your overmolded parts with excellent surface finishes. RapidDirect offers a long list of surface finishing options to improve the cosmetic quality of your products. We provide exceptional secondary operations to improve the overall quality of products.

Name Description Link
P02 1 S07 Glossy Glossy A grade finishes are made using a diamond buffing process and yield shiny and glossy surfaces on injection molded parts. Learn More>>
P02 1 S07 Semi glossy

Semi-glossy

B grade finishes use grit sandpaper to produce parts with a slightly rougher finish than grade A parts. Custom molded plastic parts that undergo B grade finishing have a matte surface texture.
P02 1 S07 Matte Matte C grade finishes use grit sanding stones to produce a rough, uneven surface. Injection plastic parts that undergo C grade finishing have a matte surface texture. Learn More>>
P02 1 S07 Textured Textured D grade finishes use grit and dry glass beads or oxide to produce a very rough textured finish. Depending on the type of material used, products can have a satin or dull finish.

Applications of Overmolding

The injection overmolding process is compatible with a wide variety of materials, ranging from plastics to metals. This process helps produce custom prototypes and production parts for various applications depending on your requirements. Several industries find valuable uses for overmolding services.

Surgical Instruments

Overmolding meets the precision and safety requirements of the medical industry. The ability to combine plastics and metal materials ensures the efficient creation of surgical devices, equipment housing, catheters, syringes, and more.

Electrical Applications

Using thermoplastic elastomer as an overmold material makes the process useful for electrical components. Custom-made overmolded parts, like electrical outlet covers, gaskets, etc., are made to withstand harsh conditions, making them last longer.

Hareware Tools

The functional advantages of overmolding make it an outstanding process for making pliers, screwdrivers, hammers, wrenches, pocket knives, and more. The process improves the grip of these tools, making their application more efficient.

 

Household Items

The overmolding technique generally improves functional performance like grip, cleanliness, and ease of use. It also enhances vibration dampening, chemical resistance, and more. This makes them useful for household items like kitchen utensils, toothbrushes, pens, shampoo bottles, etc.

Gallery of Overmolded Parts

Why Choose RapidDirect

We take an approach that aims to meet your customized needs. We aim to provide long-term prototype overmolding solutions to engineering experts and project managers from design to production. RapidDirect combines cost-effective mold tooling with tech-driven overmolding services that help to make high-quality parts.

1Asset 5

No MOQ

No minimum order requirement helps move plastic molded parts from design to production in a fast turnaround and supports your on-demand molding manufacturing needs with reduced manufacturing cost.

1Efficiency

High Efficiency

With certified domestic factories and a strong supply chain system, we accelerate the product development cycle and bridge the production of your overmolded parts as fast as possible.

1Inj Consistency High Quality

Consistency and High Quality

Owing certified factories, conducting in-process inspections and dimensional verification after production, guarantee the custom molded parts are consistent in quality regardless of the complex shape with high precision.

1Molding

Overmolding Specialists

Working with our experts having 10+ years of experience in the injection molding industry, efficiently complete a turnaround from prototyping to production.

See What Our Customers Say About Us

A customer’s words have a more substantial impact than a company’s claims – and see what our satisfied customers have said regarding how we fulfilled their requirements.

Play Video about insert molding vs overmolding

Overmolding vs Insert Molding

While there are various similarities between overmolding and insert molding, there are also certain differences you must note. Here’s a video to explain the vital differences between these valuable processes.

Our Overmolding Service for Various Industries

RapidDirect works with leading manufacturers from different industries to support growing demands and streamline their supply chain. The digitalization of our custom injection molding services helps more and more manufacturers bring their idea to products.

Automotive

Aerospace

Consumer Goods

Medical Devices

Robotics

Let's Start A New Project Today

Frequently Asked Questions

Our mold-making process includes 6 steps:

Step 1: Production arrangement: Determine all of the requirements and arrange the production.

Step 2: DFM report analysis: Provide free but detailed production DFM report for further feasibility analysis.

Step 3: Production the mold: Put the mold into production and provide the Tooling Schedule form for the whole cycle for clients to check the process at any time.

Step 4: Free sample to test: Put the mold into production and provide the Tooling Schedule form for the whole cycle for clients to check the process at any time.

Step 5: Mass production:Client confirms the samples are qualified, then officially proceed with the subsequent production.

Step 6: Mold saving: Production is completed and delivered after quality inspection. Mold will be cleaned and properly stored for the next round of parts production.

Tolerance is very important, and if not correctly specified and controlled, assembling will fail. RapidDirect uses ISO 2068-c standard for injection molding tolerances unless tighter tolerance required.

No minimum order quantity, but the oder pricing will be more competitive if qty is higher.

After you place order, it takes about 35 days for mold designing and making, and more 3-5 days for molded parts production.

Generally, we generate the quote after our platform must have considered several factors, including the size of the component, mold complexity, number of injection cavities, materials, post-processing needs, etc.

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